The casualties included two Lao patients who had been attacked by a buffalo and were being transferred to a medical facility in Thailand. They were identified as Ton Sintawong and Luea Yodkaeo.

“Four of their relatives, a nurse and a doctor were also in the ambulance,” Sinjai Seesa-ard, the 30-year-old ambulance driver, said.

Sinjai said the road accident did not cause any serious injury.